Dourle-focusing reflector



Patented Nov. 3, 1925. l UNITED STATES LOUIS A. BEANQlOF DENVER, COLORADO.

DoUBLFrFocusING REFLECTOR.

Application led May 5,

To aZZ whom it may concern.'

Be it known that I, LoUrs A. BEAN, a

,citizen of the United States of America, rey at Denver, in the county of Denver sidin and l tate of Colorado, have invented certain new and useful Improvements 1n Double- Focusing Reflectors, of'which the following is a specification.

This invention relates to reflectors for the projection of light and, while particularly applicable to automobile lightmg, willl be found valuable in many other installations such as flood lighting, sign lights, etc.

The principal object of the invention is to provide means in the reflector for obtaining a double focus with the light source whereby a portion of the reflector can be employed to spread or diffuse the light rays while another portion is employed to direct a concentrated beam of light.

Other objects and advantages reside vin the detail construction of the invention, which result in simplicity, economy, and efliciency,. and which will'become more apparent from the following description.

.The invention is particularly useful when applied to the ap licants reflector, patented January 8, 1924, o. 1,480,364, but can also be used to an advantage in any type such as -the common parabolic reflector.

In the following detailed description of the invention reference is had to the accomanying drawing which forms a part hereof.

ike numerals refer to like parts in all views of the drawing and throughout the description.

In the drawing:1 Fig. 1 is a face view of an automobile headlight inV which -the invention is em-A bodied.

Fig. 2 is a cross-section through the saine taken on the vertical center line.

Fig. 3 is a cross-section taken on the line 3 3, Fig. 2.

At 10 is illustrated a housing, inI one face of which, a transparent lens 11 is afliXed. A relatively large reflector 12 faces the lens 11 and is provided with a tubular extension 13 which extends back to the rear face of the housing 10.

Slidably mounted in the extensionv 13, is a smaller reflector 14 in which, a light source 15 is adjustably mounted. The reflector 14 is provided with a peripheral flange 16 which slides on the interior surface of the extension 13 and holds the smaller reflector 1924. Serial No. 711,188.

in alignment. A slot 1.8 in the flange 16 fits over a stationary pin 17 to prevent rotation of the reflector 14. The light source 15 is carried in a socket 19 which is slidably mounted in a tube 20, projecting from the reflector 14.

Projecting from the' rear ofthe housing 10, are two focusing screws 21 and 22. The screw 2l is threaded in a lug 23 carried onthe tube 20. The screw 22 is threaded in al lug 24 carried on the-socket 19. A slot 29 is provided in the tube 20 for the passage of the lug 24. Current is supplied to the light source 15 through a conductor 25. The housing 10 may be mounted on any suitable standard 26.

As illustrated, the reflector 12 is of greater width than height, and is curved so as to project a Wide fan-shapedbeam of light. By adding the reflector 14 to a reflector of this type, the illumination straightV ahead, where it is most needed, is increased. The housing 10 is rectangular in shape so that triangular shaped areas, 28, are formed by the curved sides, 27, of the reflector.

Let us suppose that the device is to be applied to an automobile and it'is desired to obtain a Wide fan-shaped spread of light in combination with an intense beam of light projecting directly ahead. The light source 15 is moved forward or back by means of the focusing screw 22 until it is in the proper focus with the reflector l2 to producethe desired spread of light. The reflector 14 is now moved forward or back, the light source 15 remaining stationary,by means of the focusing screw 21 until it is in proper focus with the light source 15 to produce a beam of light of the desired intensity. Thus, it may be seen that the light source ma be, what might be termed, out of focus wit the reflector 12 and yet in perfect focus with the reflector 14.

Particularlyv desirable results have been obtained by forming the .reflector 12 along the lines laid out in the applicants Patent No. 1,480,364, and forming the smaller ref flector 145m a perfect parabolic curve. The larger reflector will then project a fanshaped, diverging beam of light, while the smaller reflector will project practically parallel beams -of light.

While a. specific form of the imdprovement has been described and illustrate 4herein, it is desired and understood that the same ma be varied, within the scope of the append d claims,e Without departin'gffrom the spirit of the invention. i v

Having thus described the invention what I elaimr'anddesire securedy by Letters Pat- 1. A light projecting-mechanism comprising a housing; a reflector opening to one side of said housing and having av tubular extension on its rear opening to'said reflector; a

second reflector: slidabl mounted in said ex tension; a lamp hol ing socket slidably mounted in said second reflector; an adjust- -ingscrew carried in'said housing; a threadedy lugon said second reflector engagedby. vsaid adj-ustingf-screw; a second adjustingy lscrew carriedLin-saidhousing and a threaded lug onsaid socket engaged Ab y said second l 'I adjusting screw.,v`

- v 2; automobile "headlight comprising in ,combination a housing having a lens openv Qing; a reiector facing s aid lens opening;

' a tubular extension opening to the rear of said reflector; a second reflector axially slid- .able in said extension; a light support slidably mounted in said second-reflector means for preventing the rotation of said second reflector in said first reflector, an adjusting screw'for actuating said light support from' the. exterior of said housing and a second adjusting screw for .actuating said second 3. An `automobile headlight comprising a housing having a lens opening; a reector -faoing said lens opening; a tubular extensionbpening to the rear of saidgreflector;

and ysecured to the rear vof said housing; a

second reflector slidably mounted in said ex- 'said second reiiector and said light support from the exterior of said housing.

Inl testimony whereof, I alix'my signature. j LOUIS A. BEAN. v

so.v reflector independently of said light support. 

